Coupling-fastener.



e. HON'OLD.

COUPLING FASTENER. APPLICATION FILED OCT. 24. 191].

1,1fifi558 Patented Jan 11, 1916.

tuuTnn sTaTns GOTTLOB HQNOLID, 0F fiTUTTGART, GERMANY, ASSIGNOR TO THEFIRM OE BOSCH, OE STUTTGART, GER-MANY.

COUPLING-FASTENER.

Specification of Letters Patent.

lPatented Jan.

Original application filed September 23, 1910, Serial No. 583,378.Divided. and this application filed catcher To all whom it may concernBe it known that I, Go'rrnon Horzono, a subject of the Emperor of"Germany, and resident of Stuttgart, Germany, have invented certain newand useful Improvements in Couplingl asteners; and I do horehydeclarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

The present invention has to do with devices for coupling together theabutting ends of shafts, and relates particularly to mechanismpermitting the exact adjustment of the parts of such a device.

lhe invention is peculiarly serviceable in connection, with the couplingof the armature shaft of an electric ignition machine to the drivingshaft which is in turn driven from the crank shaft of an internalcombustion engine. In couplings of that kind, it is of great practicalimportance that the two coupled shafts, 2'. 0., the driving shaftactuated by the engine and the armature shaft of the ignition machine,should be brought into and held in a definite relative position so thatthe ignition will occur when the electromotive force generated by theignition machine attains the desired value, which is usually at or nearits maximum.

In the accompanying drawings illustrating the preferred embodiment of myinvention applied to couplings for axially abutting shafts, Figure 1 isa side view, partly in section, of a coupling with the fastening devicesin place; Fig. 2 is an end view of the coupling part on one shaft withits fastening device in place; Fig. 3 is an end View of the couplingpart on the other shaft; and Fig. l is a section on the line i lof Fig.1 showing particularly the fastening devices.

The particular coupling device shown in the drawings forms no part of mypresent invention but is described and claimed in my application forUnited States Letters Patent Serial No. 583,378, filed September 23,1910, of which this application is a division.

The coupling part Z is fastened on its shaft k by the wedge pin 71 inthe usual way. The other coupling part is then carefully adjusted into,and secured in the correct being shaped with a shoulder Serial No.656,493.

position by the following mechanism. the hub of the coupling disk 0 acylindr I hole is bored into which is inserted a h drical bolt p whichhas on one side lar segment-shaped recess 7; fitting the c lindricalsurface of the shaft. To adjus coupling part c on the shaft, the colt pis first placed in its cylindrical hole with the recess in position toreceive the cylinf surface of the shaft, and the hub of t e r: plingparts 0 and Z are then brou l coupling engagement and the nut oi 79 isscrewed up to such an extent that to. hub 0 can be shifted only with di.around the shaft. Thereupon the armati is brought exactly into theposition which; it is to have when running and the nut of the bolt 77 isfurther tightened. Huh 0 is thereby exactly fixed on the shaft a. On theside opposite the bolt 37, the hub is provided with a second tangentialbore for the reception of a wedge pin 6. The shaft (2 at this place,however, is yet left round, so that its periphery projects into the borefor the wedge Z). The portion of the shaft s periphery projecting intothe bore is thereupon removed by boring orliling. Nhen thereafter thewedge pin b is drawn in and clamped fast by the aid of its nut, thecoupling is fixed upon the shaft exactly in the adjusted position.

Having thus described my invention, what I claim is:

1. The combination with an armature shaft and a driving shaft, the bestangular relation of which can be determined only by trial rotations,said shafts-having abutting: ends and being in axial alinement, ofcoupling mechanism therefor comprising a coupling member rigidly securedto one shaft, a second coupling member engaging there- 9 with andmounted on the other shaft, and a pair of securing devices comprisingmeans for holding said second coupling member on its shaft, one of saidsecuring devices which bears against a smooth portion of said last namedshaft to permit said second coupling incinher to turn on its shaft, butwith difficulty, while the trial rotation is being made, and the othersecuring device holding said coupling rigidly to its shaft when itsadjusted position has been determined lay the trial rotation.

2. The combination of a pair of axially alined shafts, the best angularrelation of which can be determined only by trial rotation while coupledtogether, one being an armature shaft and the other a driving shaft, andcoupling mechanism therefor comprising a coupling member rigidly securedto one shaft, a second couplingmember cooperatively engaging therewithand mount ed on the other shaft, and a pair of securing devices for saidsecond coupling member, one of said devices consisting of a boltextending through the coupling member and having a shoulder yieldinglygripping the cylindrical surface of the shaft, and the other of saiddevices rigidly locking its coupling member to said shaft.

3. The combination of a pair of axially alined shafts, the best angularrelation of Which can be determined only by trial rotation while coupledtogether, and coupling mechanism therefor comprising a coupling memberrigidly secured to one shaft, a second coupling member cooperativelyengaging therewith and mounted on the other shaft, and a pair ofsecuring devices for said second coupling member, one of said devicesconsisting of a bolt cut away to fit the circular curvature of the shaftand forming a shoulder yieldingly gripping the cylindrical surface ofthe shaft to permit its coupling member to turn on said shaft, but withdifficulty, while the trial rotation is being made, and the othersecuring device consisting of a wedge pin'fitted in a recess of saidshaft and rigidly locking its coupling member against rotation from itsfinal adjusted position, as determined by the trial rotation.

4. The combination of a pair of axially slined shafts, the best angularrelation of which can be determined only by trial rotation while coupledtogether, and coupling mechanism therefor, comprising a coupling memberrigidly secured to one shaft, a second coupling member operativelyengaging therewith and mounted on the other shaft, and a pair ofsecuring devices for said second coupling member, one of said devicesconsisting of a bolt extending through the coupling member and cut awayat the shaft to form a shoulder for yieldingly gripping the cylindricalsurface, said bolt being adjusted to permit said second coupling memberto turn on its shaft, but with difficulty, while the trial rotation isbeing made, and the second of said securing devices consisting of awedge pin passing through the coupling member and fitted to a recess ofsaid shaft to rigidly lock said coupling member against rotation on saidshaft after said coupling member has been adjusted to its final positionby trial rotation with the opposing member.

The combination of a shaft having a recess in one side, a couplingmember mounted thereon, a bolt passing through said coupling member andhaving a shoulder which grips the cylindrical surface of said shaft butpermits rotation thereof with respect to said coupling member, thoughwith diiiiculty, and a locking pin in said coupling member fitted to therecess of said shaft for rigidly securing said coupling member againstrotation on said shaft. 0

In testimony whereof I afiin in presence of two witnesses.

GOTTLOB HONOLI).

my signature lVitncsses \VAL'rnnR STEIN CKE, Rnmiionn ELwnn'r.

